Hello all, please help me regarding my central heating problem. Basically when i set the control unit (lifesyle LP522) to "OFF" position the boiler still turn on and wont go off, The boiler is a combi "Potterton Suprima 30 L". All the radiators is boiling hot and i cant shout the boiler down from the main switch or i will have no hot water in the morning. Im not sure what to look for as i have not idea when it come to boiler and it control unit. Could this have something to do with the control unit? Anyone have similar problem please advise. Much appreciated This problem only started tonight